Ironwood Pharmaceuticals, Inc. is a biotechnology company. The Company's products Linaclotide provides patients and healthcare practitioners with a treatment option for adults in the United States and certain other countries with irritable bowel syndrome with constipation (IBS-C), chronic idiopathic constipation (CIC) and gastrointestinal (GI) disorders. It operates through human therapeutics segment. Linaclotide is also being developed and commercialized in other parts of the world by certain of its partners. It is engaged in developing therapeutic platforms for the treatment of vascular and fibrotic diseases, and refractory gastroesophageal reflux disease (GERD). Its IW-9179 is used for the treatment of gastroparesis and functional dyspepsia. The Company has conducted an exploratory Phase IIa clinical study of IW-3718 in patients with refractory GERD. It has two sGC development candidates, which include IW-1973 and IW-1701.